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PR target/39118 * config/i386/i386.md (UNSPEC_MEMORY_BLOCKAGE): New constant. (memory_blockage): New expander. (*memory_blockage): New insn pattern. * config/i386/i386.c (ix86_expand_prologue): Use memory_blockage instead of general blockage at the end of function prologue when frame pointer is used to access red zone area. Do not emit blockage when profiling, it is emitted in generic code. (ix86_expand_epilogue): Emit memory_blockage at the beginning of function epilogue when frame pointer is used to access red zone area. From-SVN: r144100
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